Los Angeles County Supervisor Ed Edelman said Thursday that he will make one last effort to save the Pan Pacific Auditorium, an abandoned relic of the 1930s that has become a magnet for youth gangs and graffiti artists. He also said the county will try to improve security in nearby Pan Pacific Park, the scene of a fatal shooting during the Memorial Day weekend.

An ambitious national film and video center was announced Thursday as the centerpiece of the planned restoration of the Pan Pacific Auditorium, culminating a 13-year struggle to save the 50-year-old Los Angeles landmark. The nonprofit American Cinematheque, along with a medium-sized hotel, retail and office space, will be part of the planned $22-million Pan Pacific Center, which is expected to open in early 1987.